Drilling machine



Apfii 28, 1925.

v w; T. SEARS DRILLING MACHINE 'oi inal Filed Sept. 9. 1921 PatentedApr. 28, 1925.

UNITED STATES WILLARD SEARS, OLE MONTCLAI R, NEW 513351. 55 dSSIG-NORTF9 It IIL'ES-EEMENT- POND COMPANY, 013 NEW YORK, N. S21, itCUH-PQRAEEON GT-Z1 "NEW? JERSEY.

DRILLING EEACHENE.

Application fi1ed September 9, 1921, Serial No. 499,522. RenewedFebruary 23, 1923.

T all whom it may concern: drilling machine embodying my invention.

Be it known that l VVILLARD T. Series a F1 2 is an enlaro'ed fragmentarysec- 7 7 b a x v citizen of the United States, residing at tional v ewot the clamping mechanism. as

h lontclair, in the county of Essex and State Fig. 3 is a diagrammaticview oi a cam of New Jersey, have invented certain new path on theclutch to be hereinafter deand useful Improvements in DrillingMascribed.

chines, of which the following is a spcci'lica- Figs. 4%. and 5 arefragmentary detail views tion. illustrating the clamping; mechanism inthe This invention relates to drilling machines clamped and unclampedpositions respec 10 and particularly to an improved drill coltively.

umn clamping mechanism broadly of the Referring more specifically to thedrawine type defined in my copending application by referencecharacters. 1. indicates the bed Serial No. M99521 filed on even datehere of a radial drilling machine on the base 2 of with. In the presentinvention however, a which is mounted for rotary adjustment a 5clampingmechanism including a clamping drill supporting column 3 A 5 4is i1 shaft operated in a single direction from the lustrated as mountedfor vertical movement main power means is provided. a clutch. on thecolumn and a drill. supporting); elepreterably of the friction type,being; used ment 5 is mounted for horizontal movement for operativelyconnecting the column along the arm. A main power means 6 0 clampingmechanism with the main power provided for operating; the drillinginechameans for performing the clamping operanism. including therotation ot the drill tion, It is the primary object of the invenspindle7. The driving; connection from the iJiOIl PTOVidB drill 0011mm p gpower means to the drill spindle compri e mechanism of the type statedwherein the th usual dpivinp: l f i d- 1 25 clamping; means clamps andunclamps the power shaft 8, a vertical shalt 9 within the column byintermittent rotary move el i? column and an arm shaft 10. the usualgear of the clamping shaft in the same direction, in b i id d fpapqtivelv i means as a clutch and its Controlling; 11180119 inc; theseseveral shatts a id the drill spindle.

nismi being Provided E01? Controlling 519% The mechanism thus described.within 30 movements as desired. itself. COHlpl'. see no part ot thepresent in A further object of the invention is to pro vention andtherefore will. not be tnrther vide a clampingmechanism of the abovedescribed herein. The novel mechanism type wherein a friction clutch iscontrolled comprising the invention will now be deby electroanagneticmeans in a manner to rib d i fl tail quickly and conveniently clamp thecolum As heretofore stated. the drill column 3 is at the will of theoperator. adapted to be adinstablv rotated about its With these andother objects in view my vertical axis to permit the swinging; adjustinvention consists in the features of. conment of the drill supporting;arm. The struction and operation set. forth in the tolbase 2 is slottedat Hand 12 to provide a 40 lowing specification and illustrated in themovable clamping; portion 13 for gripping accompanying drawing. In suchdrawing); the column to secure the same against rota annexed hereto andforming a part of this tion while performing drilling operations. I

specification, l have shown my invention as have illustrated thisclampine' portion as embodied in one type of radial drilling maprovidedwith a clamping mechanism inchine, but it will be understood that theeluding an eccentric 14-, on a shaft 15 rot-ainvention can be otherwiseembodied and tably mounted in two lugs 16 on the base. that the drawingis not to be construed as An element 17 engages the eccentric andcondefining; or limiting; the scope of the invennects the lugs 16 to theclamping: portion 13. tion, the claims appended to this specifica- Checknuts 18 are provided on the elemei'it 50 tion being" relied upon f r h DIP 17 for adjusting: the same. Rotation of the Referring to the figuresof the drawing: eccentric is adapted to clamp and unclamp Figure 1 is aperspective View of a radial the column.

In the drawing, 1 have illustrated mechanism for rotating the eccentricin a single direction from the main power means to et'- feet theclamping and unclarnping oi the column. While the connecting means between the main power and the clamping mechanism is illustrated as afriction clutch, it will he readily understood that the scope of myinvention comprises the use of any other convenient means for performingthe same tunction.

A. vertical shaft 19 is illustrated as being driven from the columnsl-iai'it through gears 20. The clamping shai' t i5 is adapted to herotated from the shait if) for ethxoting the clamping: e't the columnthrough the tollowing mechanism. such mechanism he'ng' illustrated indetail in Fig. 2. The shafts 15 and 19 are coaxial and are provided attheir adjacent ends with the (Ofii itl'tlilnfl' parts 21 and 21 of a'triction clutch 521. The portion 21 oi the clutch is keyed to the lowerend ot shaft 19. and the portion 21" is spliued for sliding, movement onthe upper end of shaft 15, a spring sewing; to normally hold the clutchportion 21 in driving engagement with portion 21 The clutch portion 21is provided with a cam path 23 therearound, the entire contour oi thispath heiug diamrannnatically shown in Fig. 3. A solenoid is mounted on abracket. 25 adjacent the clutch. A longitudinally sliding core as in thesolenoid is provided with a roller 2"? at one end adapted to ride on thecam path, a spring 28 at the other end normally forcing: the core androller toward the clutch. The cam path formed with two syimnetricalhalves n and 1/ (Fig. 3), each half conugrising' a low portion a, araised portion 7). and a shoulder c. vi ith the roller 27 over the lowportion o, the clutch portion 21 will he held in driving engagement withthe clutch portion 21" by spring 22. With the roller over the raisedportion i). he clutch will he held disengaged as illustratec in Figs. 9and l he solenoid may he energized through a pair of terminals 29adapted to he closed by a switch 30, this switch preferably being a pushbutton on the drill supporting ele ment as illustrated.

The operation of the mechanism i. as tollows: .Vith the column in thelamped position illustrated in Figs. 3 and the column is secured againstrotation on its hase. To unclamn the colunm the operator pushes thebutton 00 whereupon the solenoid is energized and the core and roller2-? drawn from engagement with the cam path 23. The spring 22 thenengages the clutch portion 21 with the portion 21 whereby the clampingshaft 15 and eccentric l4 thereon are rotated (in the direction of thearrow, Fig. 3) from the shaft 19. As soon as the core 26 has beenwithdrawn sufliciently to disengage the roller from the cam path, theoperator releases the button 30 whereupon the spring); 28 forces thecore and roller toward the clutch. Vi hen the shoulder c has passed theroller, the roller enters the clutch hetween the clutch portion 2i" andthe portion 0. of the cam path and the shaft 15 continues its rotationuntil the raised portion 7') rides beneath the rolle and withdraws theportion 21 ot the clutch troin the portion 21 The rotation of the shaft1.? is stopped and the eccentric held in the unclamping position by theroller engaging and resting against the shoulder 0 shown at the right ofFig. 3. to clamp the column the operator again pushes the button -10whereupon the shatt 15 is rotated 180 in. the same manner heretoforedescribed, the "roller, however, coming against the shoulder 0 shown atthe left of Fig. The detail views of the eccentrics shown in Figs. -1-and 5 indicate respectively the clamping and unclainping positions oi?the eccentric corresponding to the adja ent positions of the shoulders 0relative to the roller 28 as snown in Fig. 3.

hat I claim is:

l. in a drilling machine, the coinhination oi a hase, a column rotatablysupported on the base, drilling mechanism carried by the column, powermeans for operating :he d Illing; mechanism, clamping means forengaging; the column adjacent the hase, and means comprising a frictionclutch tor operatively connecting the clamping means with the powermeans for effecting the clamping of the column through the clampingmeans.

2. In a drilling machine. the combination of, a base, a column rotatahlysupported on the hase, drilling mechanism carried by the column, powermeans for operating the drill inn mechanism, clamping means for engagingthe column adjacent the base, means comprising" a friction clutch toroperatively onnecting the clamping' means with the power means foreffecting the clamping oi the column. through the clamping means, meansfor closing the clutch, and means for opening and holding the clutchopen with the clampin means either in the clamped or unclamped position.

In a drilling machine. the comhination oi a hase, a column rotatahlysupported on the hase, drilling mechanism carried by the column, powermeans for operating" the drilling mechanism, clamping means surroundingthe column adjacent the base. a clutch ilor operatively connecting theclamping means with the power means for effecting the clamping of thecolumn through the clamping means, a spring for normally closing; theclutch, and means under the control of the operator for automaticallyopen ing the clutch against the action of the spring in a manner leavingthe clamping means either in the column clamping or unclamping position.

4:. In a drilling machine, the combination of a base, a column rotatablysupported on the base, drilling mechanism carried by the column, powermeans for operating the drilling mechanism, clamping means for engagingthe column adjacent the base, means comprising a clutch for operativelyconnecting the clamping means with the power means for effecting theclamping of the column through the clamping means, a spring for normallyclosing the clutch, the clutch being provided with a path extendingtherearound and having a shoulder thereon, and means riding on the pathand adapted to engage the shoulder to disengage the clutch against theaction of the spring when the clamping mechanism has been moved to thedesired position.

5. In a drilling machine, the combination of a base, a column rotatablysupported on the base, drilling mechanism carried by the column, powermeans for operating the drilling mechanism, clamping means for engagingthe column adjacent the base, a shaft operatively connected with theclamping means, a clutch for operatively connecting the shaft with thepower means for effecting the clamping of the column through theclamping means, means for closing the clutch, the clutch being providedwith a path extending therearound and having a pair of shouldersthereon, and means riding on the path and adapted to engage theshoulders to stop the rotation of the shaft with the clamping means inthe clamped and unclamped positions respectively.

6. In a drilling machine, the combination of a base, a column rotatablysupported on the base, drilling mechanism carried by the column, powermeans for operating the drilling mechanism, clamping means surroundingthe column adjacent the base, a shaft operatively connected with theclamping means for operating the same, rotation of the shaft in a singledirection being adapted to clamp and unclamp the column, and means underthe control of the operator for operatively connecting the power meanswith the said shaft to intermittently rotate the shaft in the samedirection and to alternately clamp and unclamp the column.

7. In a drilling machine, the combination of a base, a column rotatablysupported on the base, drilling mechanism carried by the column, powermeans for operating the drilling mechanism, clamping means surroundingthe column adjacent the base, a shaft operatively connected with theclamping means for operating the same, rotation of the shaft in a singledirection being adapted to clamp and unclamp the column, means underthecontrol of the operator for operatively connecting the power means withthe said shaft to intermittently rotate the shaft in the same directionand to alternately clamp and unclamp the column, and stop means foralternately stopping the rotation of the shaft in the clamping andunclamping positions respectively.

8. In a drilling machine, the combination of a base, a column rotatablysupported on the base, drilling mechanism carried by the column, powgermeans for operating the drilling mechanism, clamping means for engagingthe column adjacent the base, a clutch for operatively connecting theclampingmeans with the power means for effecting the clamping of thecolumn through the clamping means, and a switch comprising a singleelectric circuit for controlling the clutch to clamp and unclamp thecolumn.

9. In a drilling machine, the combination of a base, a column rotatablysupported on the base, drilling mechanism carried by the dolumn, powermeans for operating the drilling mechanism, clamping means for engagingthe column adjacent the base, a clutch always rotatable in the samedirection from the power means and adapted to operatively connect theclamping means with the power means for effecting clamping of the columnthrough the clamping means, and means comprising an electric switch forcontrolling the clutch to clamp and unclamp the column, the intermittentclosing of the switch being adapted to alternately clamp and unclampthecolumn.

10. In a drilling machine, the combination of a base, a column rotatablysupported on the base, an arm carried by the column, a drill supportingelement on the arm, power means for operating the drill, clamping meansfor engaging the column adjacent the base, means comprising a frictionclutch for operatively connecting the clamping means with the powermeans for effecting the clamping of the column through the clampingmeans, and means comprising a hand operated device on the drillsupporting element for controlling the clamping operation through thefriction clutch.

11. In a drilling machine, the combination of a base, a column rotatablysupported on the base, drilling mechanism carried by the column, powermeans for operating the drilling mechanism, clamping means for engagingthe column adjacent the base, means comprising a friction clutch foroperatively connecting the clamping means with the power means foreffecting the clamping of the column through the clamping means, andelectro-magnetic means for controlling the clutch.

12. In a drilling machine, the combination of a base, a column rotatablysupported on the base, an arm carried by the column, a drill supportingelement on the arm, power means for operating the drill, clamping meansfor engaging the column adjacent the base, means comprising a triotionclutch for operatively connecting the clamping means with the powermeans for effecting the clamping oi the column through the clampingmeans, electro-magnetic means for controlling the clutch, and a switchon the drill supporting element for controlling the eleetro-nmgneticmeans.

In testin'iony whereof 1 hereto aflix my signature.

WILLARD 'l. SEARS.

